TDEE (Total Daily Energy Expenditure)

Definition

TDEE is the total energy burned by the body in 24 hours, calculated as BMR multiplied by an activity factor. Activity levels: Sedentary (little/no exercise) × 1.2, Light (1-3 days/week) × 1.375, Moderate (3-5 days/week) × 1.55, Very Active (6-7 days/week) × 1.725, Extra Active (physical job + daily exercise) × 1.9. TDEE is used for weight management: eat below TDEE for weight loss, above for weight gain, and at maintenance to stay the same. A deficit of 500-1000 calories/day leads to 0.5-1 kg weight loss per week.